Ch.33 - InvertebratesSee all chapters
All Chapters
Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology

Lophotrochozoans

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Sections
Porifera and Cnideria
Lophotrochozoans
Ecdysozoans
Echinoderms
Additional Problems
Which one of the following is not a characteristic shared by all mollusks?a. a mantleb. gillsc. a radulad. a coelome. All of the above are shared by mollusks.
The first segmented animals to evolve were:a. rotifersb. cephalopodsc. arthropodsd. echinodermse. annelids
Gastropods, cephalopods, and bivalves all sharea. a mantleb. tentaclesc. a radulad. an external shell
Which of the following is not a characteristic of most annelids?a. nephridiab. closed circulatory systemc. segmentationd. pseudocoelome. setae
Which of the following belongs to the phylum Annelida?a. polychaetesb. gastropodsc. nematodsd. arthropodse. cephalopods
The key evolutionary advance in annelids isa. cephalizationb. coelomc. segmentationd. lophophoree. deuterostome development
For excretion, flatworms usea. nephridiab. flame cellsc. osmosisd. regurgitation
Sexually, most flatworms area. parthenogenicb. asexualc. hermaphroditicd. amorphouse. aphrodisiac
Key evolutionary advances of the solid worms are bilateral symmetry and:a. a coelomb. internal organsc. a one-way digestive tractd. a body cavitye. a circulatory system
A rasping radula is characteristic of all mollusks excepta. bivalvesb. cephalopodsc. gastropodsd. chiton
Which of the following mollusks is internally segmented?a. chitonb. gastropodc. cephalopodd. none of the above
Presumably the complex eyes of _______________ enable them to escape predators.a. snailsb. scallopsc. oystersd. giant clamse. whelks
The molluscan radula is used fora. reproductionb. locomotionc. respirationd. circulatione. food getting
If you can't tell a squid from an octopus, count their tentacles. Squids havea. 12b. 16c. 8d. 10e. 80-90
Sexually, earthworms area. separate sexedb. hermaphroditic but not self-fertilizingc. parthenogenicd. hermaphroditic and self-fertilizinge. none of the above
Most marine gastropods have a lid, called the _______________ , that can close off the opening to their shell.a. rostrumb. prorostrumc. osculumd. operculume. rellium
The only class of mollusk to have a closed circulatory system includes thea. polychaeteb. brachiopodc. snaild. oystere. octopus
The first larval stage of mollusks is thea. naiadb. trochophorec. planulad. veligere. oligophore
Most bivalve mollusks area. parasitesb. commensulsc. predatorsd. saprophytese. filter feeders
Bivalves use _______________ to convey food to their mouthsa. ciliab. parapodiac. palpsd. setaee. flagella
Which of the following statements about annelids and flatworms is correct?a. Both have a complete digestive tract.b. Both have a body cavity of one type or another.c. Both have a closed circulatory system.d. Flatworms are unsegmented, whereas annelids are segmented.e. b, c, and d are true.
We are somewhat flattened and our dorsal surface is convex and covered with 8 articulating plates. We occur on rocky surfaces in the intertidal regions and our radula scrapes algae off the rocks. Our mantle forms a girdle around the margin of our plates and on each side of the foot is a row of gills suspended from the roof of the mantle cavity. Which of the following has our correct taxonomy?A. Phylum Mollusca, Class GastropodaB. Phylum Nematoda, Class BivalviaC. Phylum Mollusca, Class PolyplacophoraD. Phylum Mollusca, Class Bivalvia
Which one of the following is incorrect concerning molluscs?A. Some members of the Phylum Mollusca are filter feeders.B. All members of the Phylum Mollusca have a radula.C. Not all members of the Phylum Mollusca have an external shell.D. Some members have direct development and do not produce larval stages.